Stoker



Oct. 243, 1934. H. P. ANDERSON STOKER Original Filed Sept. 24, 1930 2 Sheets-Sheet l A TTORNE Y Oct. 23, 1934. H. P. ANDERSON 1,978,358

STOKER f original Filed sept. 24. 1930 2 sheets-sheet 2 llllllfllll/l/z.

4 J i l q a s? im) INVENTOR patented ct. 2k3, 934

STGKER Howard P. Anderson, Erie, Pa.,"assignor` to `'.llie

Standard Stoker Company, Incorporated, a cor'- poration of Delaware `Application september 24, 1930, serial No. l484,084

. Renewed March 23,1934

My inventionrelates generally to stokers and more particularly to locomotive stokers of the type in which fuel is scatteredoverthe frebox vin aerial paths.

It is an object of this `invention to provide aA novel Stoker having an arrangement and com- It is another objectof the invention to provide a novel distributingsystem in which distribution of fuel over the various parts of the iirebed may be independently and conveniently controlled to produce heavier or-lighter firing as desired.

Further advantages of the invention reside in the combination and arrangement of parts in a mechanical Stoker productive of a more eflicient and economical distribution of fuel over a re hereinafter more particularly described, illustrated and claimed.

A preferred and practical embodiment of the invention is illustrated in theaccompanying drawings, in which Fig. 1 is a central longitudinal vertical section of a portion of a locomotive'with a stoker therefor, the vdistributing system being shown in section; v f n Fig. 2 is a plan section on the line 2--2 lof Fig. 1; Y i g `Fig. 3 is a viewsimilar toFig. `1 with the distributor manifold of the distributing system and thefuel feeding conduits being shown diagrammatically; and Y y Fig.` 4 is aplan View of the structure shown `in Fig. 3withparts broken away and parts 4in section. i l fi. A portion of a locomotive boiler `f'lreboxV is represented at 10; `the grates therefor at 11; `the backhead of` the boiler at 12 andthe firing opening thereinat 13.

The stoking mechanism indicated generally at 14 comprises the telescoping conduit 15, an elbow conduit 16 carried from the-backhead 12 by a supporting; bracket 1'1, and a hood portion l18 surmounting the elbow 16 and communicating at its forward end through the discharge mouth19 with the lower portion of the firing opening 13.

` The elbow 16 terminates at its lower end in a spherical seat 20 adapted to receive the ball member 21 of the conduit 15. A distributor table 22 is detachably connected to the upstanding wall 23 of the elbow 16 by suitable means such `as thebolts 24, 24a, and extends forwardly from `without the frebox and terminates in the firing opening. Since the distributor table does not extend into the frebox it is not subjected to the intense .iirebox heatftherebyincreasing the service life of the distributor table.

,The hood portion 18 surmounting the elbow 16 -is. fastened thereto by the bolts 25, and is 60 provided with the flanges 26, 26a for attachment to the` vbaclihead,v by suitable fastening means,

as by;` bolts, not shown. V'I'he hood portion comprises the outwardly flaringgsidewalls 27, l28, the removable cover 29, .and at the rear is provided with a detachable manifold 30 forming the backwall thereof. f-

The` fuel from thegtelescoping conduit 15 is received in and directed forwardly and upwardly from thefend of the screw conveyor 31 by the 7.0 curved elbow 16'to the hood portion 18. The hood :portion 18 flares laterally as it extends forwardly vto form the desirable width of discharge mouth l19 through whichjthe fuel can bemost effectively discharged by the distribut- V ing means.;` The sidewalls `27, 28` of the hood portion are .provided at their rearward ends with the laterally projecting `lugs 32, 33 adapted to receive bolts 34, 35 respectively for detachably securing the manifold 30 to the hood portion. 80

The manifold 30 is provided with a main chamber 36 extending its full length and forward .thereof a pluralityof independent steam chambers ,37 side by side in a horizontal plana-each .being supplied with steam from the main cham- .ber 36, Steam-is supplied to the main chamber Vby a supply pipe 38 from any suitable source,

as from the `locomotive boiler. Screw valves 39 are arranged to `seat on the valve seats 40 so Lthat thesupply of steam `from the main chamber -f36tothe independent steam` chambers 37 may ,be independently varied and controlled.

The steam chambers 37 are provided with the 'horizontally aligned'jet openings 41, the intermedi-ate jet opening being parallellwith the center line of the locomotive `and thejet openings These blasts of steam inclines slightly downward from its rearward to its forward edge and is provided with a plurality of longitudinal upstanding ribs 42a. It will be understood that the terms rear and \front as applied tojthe distributor table 22, V

denote the rear as that portion of the table to which the fuel is delivered and the front as that portion from which the fuel is projected. The ribs 42a are highest at their forward ends and taper as they extend rearwardly until they merge into the top surface 42 of the table 22. Thus it will be seen the ribs 42d incline upwardly from the horizontal as they extend forward and the spaces between the ribs incline downwardly as they extend forward. This construction permits the fine fuel to be projected forwardly between the ribs and the lumps which are too large to pass between will be combed out and projected forwardly along the top of the ribs. Thus by giving the larger lumps of fuel a longer trajectory than the fines an even distribution of nes and lump fuel over the entire rebed is obtained. The ribs on either side of the center ribs are outwardly froml rear'to front in order to deliver fuel to the sides of the rebed. i l

The top deflector members 43,- 43awhich are fastened each to a respective sidewall of" the hood portion 18 by suitable means, as by the lum'p fuel over the entire rebed` area.

bolts 44, 44a and 45, 45a, further aid vin the equal distribution of fuel overY the rebed byinev tercepting a portion of the fuel and deflecting it to the rear corners of the rebox. The openings 46, 46a receiving` the-bolts 45, 45a respecf tively, are preferably slotted so that the inclination of the defiector members may be varied and adjusted.

In order. to effect a more equaldistribution of fuel over the rebed, auxiliarychambers asv 47, with booster jets48 therein are formed in the distributor table 22. The booster jets 48 are given an upward inclination and open at the forward edge of the table 22, and project fuelv forwardly that is too heavy to be moved to the front of the firebox by the rearjets. Pressure fluid, as steam, is supplied to the auxiliary chambers 47 through pipes 49 leading from auxiliary chambersl 50 in the manifold 3Q, andthe in# tensity of the blasts issuing from the jets 48 is regulated independently of the intensity of the blasts issuing from the jets 41 bythe val-ves 51 cooperating with the seats 52v in the auxiliary chambers 50. Three such booster" jets are provided in my preferred embodiment, but it will be obvious that more jets may be added if desired. The jets are positioned each directly beneath a respective rib, so that thefme fuel, which is projected forwardly across the distributor table in the spaces between the ribs,will not come in contact with the blast from the booster jets.

In operation, fuel is advanced continuously froml a suitable source, not shown, by the s crew 3l and is urged upwardly and forwardly through the elbow 16. The rear distributor jets strike Jthe rising column of fuel issuing from the elbow 16 and project it forwardly, the fines passing between the ribs of the distributor table and the larger lumps of fuel which are combed out by the ribs passing thereover. A portion of the projected fuel is deflected to the rear corners of the firebox by the top deflector members 43, 43a, and the heavy lumps of fuel whichare notl given sufcient impetus by the rear jets to carry them into the rebox, fall over the forward edge of the plate and are projected overthe firebed by the booster jets 48.

The novel stoker and distributor arrangement constituting this invention is productive of' `a very even and uniform distribution offines and It` is extremely exible in operation, and can be conveniently manipulated to produceheavier or lighter firing at any point of the flrebed area by adjusting the valves and top deflectors.

I claim:

l.. In a mechanical Stoker, in combination with a Firebox having a backwall and a firing opening therein, a hoodmember communicating with the lower portion of said firing opening, a conduit elbow arranged for delivery of fuel to said hood member, a distributor table terminating at its forward end in said firing opening and forming an extension from the floor portion of said hood member, means at the rear of said hood member for projecting fuel forwardly over said distributor table, means on said distributor table arranged to. separate the coarse fuel from the fines as it is projected thereover, means at the forward edge of said distributor table arranged to give added impetus to the coarse fuel and means above the fuel stream for deiiecting a portion thereof to the rear corners ofi said frebox.

2. In a mechanical Stoker., in combination with a rebox having a backwall and a ring opening therein, a hood member communicating with the lower portion of said firing opening, means for deliver-ing fuel to said hood member, a distributor table in said firing opening, pressure. uid distributing jets at the rear-of said hood member arranged toY emit a plurality of horizontal blasts of pressure fluid against the fuel and across said distributor table, meansv on said distributor table arranged to separate the coarse fuel from the fines as it is projected thereover, and pressure fluid distributing jets formed in said distributor table arranged to emitupwardly directed blasts of pressure fluid from the forward portion oflsaid distributor plate to give added impetus to the coarse fuel, and means forcontrolling the intensity of said first and second named blasts inde pendently of each` other.

3. Ina mechanical Stoker, in combination with a firebox having a backwall and a firing-r opening therein, a hood membercommunicating withthe lower portion of said firing opening, a conduit elbow arranged to deliver fuel to said? hood member in a continuous rising column, a distributor table in said firing opening, pressure fluid distributing means at the rear of said hood member for emitting a plurality of blasts of pressure uid against saidrising column of fuel and projecting it forwardly across said distributor table, means on said distributor table arranged to separate the coarsel fuel from the fines' as it is projected thereover,.and1 pressure fluidl distributing means formed with said distributor table for emitting a plurality of blasts of pressure uid from thev forward edge ofy said distributor table arranged to give-added impetus to the coa-rse fuel.

4. The combination with a-furnace ofv means for distributing fuel over the'firebedofthe furnace comprising a distributor table, distributing means rearward thereof for emitting pressure fluid against the fueland across said distributor1 table, means on saiddistributor table arrangedto separate the coarse fuel from the fines as it is projected thereover, and a sepa-rateindependently controlled pressure fluidmeans formed with said distributor table for emitting pressure uid from the forward edge vofY said distributor table arranged to give addedimpetusy to the coarse fuel.

5. The combination witha furnace of means for distributing-fuel overthe flrebed cf the furnace comprising a distributor table, a manifold rearwardly thereofA arrangedl to receive pressure fluid from a source of supply and including a main chamber and a plurality of secondary chambers arranged to receive pressure fluid from pressure in each of said secondary and said auxiliary chambers.

6. The combination with a furnace of means for distributing fuel over the rebed thereof comprising a distributor table, a distributing means rearwardly thereof for emitting pressure fluid against the fuel and across said distributor table, a plurality of upstanding ribs on said table extending longitudinally and inclined from the rearward to the forward portion thereof whereby coarse fuel will pass over said ribs and the fines will pass between said ribs, and means in said plate directly beneath said ribs arranged to emit upwardly directed blasts f pressure fluid.

HOWARD P. ANDERSON. 

